Week 1 & 2 Flashcards
_____________ __________ is the tendency for the whole helicopter to drift in the direction of the tail rotor thrust
Translational Tendency
What is the full rotating of the blades called on a helicopter?
Disk
What causes ground resonance?
Blade lead/lag (Out of Phase)
When the engine fails, and the blades begin to autorotate, what must the pilot do?
Drop the collective stick
The mast is sometimes ________ to combat the translating tendency
Tilted
What does the swashplate do?
Transfers the movement of the cyclic and collective from stationary push-pull to rotating push-pull movements
How can the pilot immediately correct ground resonance?
Pull on the collective lever
Ground Effect occurs when the helicopter is within _____ _________ __________ from the ground
1/2 Rotor Diameter
What connects to the Lower Swash Plate/Inner Ring?
Flight Controls
What are the two flight controls that control the flight of a helicopter through the MAIN ROTOR
Cyclic and Collective
To give the helicopter fuselage Directional Control,a __________ _______ _________ is vertically mounted on the tail. In order to keep the fuselage straight when increasing power, thepitchof the tail rotor is increased, using thefoot pedals
Variable Pitch Rotor
Locate the servos, push/pull tubes, bell cranks
What is Item 21.?
Outer Ring/Upper Swash Plate
The Final Link to the blades from the Flight Controls are called?
Pitch Links
If the Main rotor on a Helicopter spins CLOCKWISE, which direction does the tail rotor BLOW air?
To the RIGHT of the helicopter
What is the rotary wing equivalent to Rudder Pedals
Tail Rotor Pedals/Anti-torque pedals
The lift vector is at…?
Right angles to the rotor disk
What can a technician/AME do to reduce ground resonance?
Service shock struts
On the Cyclic, the Red Trigger is for _______________
Communication (PTT)
What are the two different switches on the collective stick?
Landing Lights and Starter Switch
The compressor turbines turn the _______ _____ set of turbines
Power Shaft
What is the problem with a Low Nr during autorotation?
Helicopter can’t slow rate of descent/ will crash
On a North American Helicopter, the pilot uses _______ pedal to fight torque
Left
_________ _________ slows the up and down movement of the collective
Friction Control
Can you hover at higher altitudes in IGE or OGE?
IGE
Main Rotor Pitch links are attached to the?
Rotating Swash Plate
Which of Newton’s laws is torque and torque reaction?
Newton’s Third Law
What does the rotor system do when the engine power train fails?
Disengages from the engine to allow free spinning in the direction of rotation
What do helicopters tend to do when hovering without any inputs from the pilot?
Drift sideways, Fly forwards
What does the torque tube to?
Connects two components// eg// collective control for pilot and copilot
What does “OGE” Stand for?
Out of ground effect
Another way to combat translational tendency is to….
Offset the Vertical Fin, keeping the fuselage straight in forward flight. This unloads the tail rotor
A ________ _____ is often placed on top of the collective, containing engine trim switches, landing lights, searchlights, and the starter button.
Switch box
Cyclic makes the Swash Plates ______
Tilt
Which type of Main Rotor Head is most susceptible to ground resonance?
Fully Articulated
What is the problem with having a high Nr during autorotation?
Overspeed and structural damage
The Collective is responsible for two things…?
Altitude and Forward Airspeed
Which rotor configuration is this?
Side By Side
What components of the helicopter help prevent ground resonance?
Shock Absorbers
During autorotation, the direction of the airflow through the main rotor is __________
Upwards
Bell cranks are used for…
Changing Direction of force + Mechanical Advantage
Which rotor configuration is this?
Tandem
Collective Sticks also often have a _______ - ______ throttle
Twist - Grip
During normal operation, the direction of the flow of air is __________
Downward
If the green nav light is on the left side, where is the aircraft moving, relative to your position?
Towards you
As the Main Rotor rotates, the helicopter wants to spin in the opposite direction, this is called…?
Torque Reaction
__________ _____________ - a force occurs 90 degrees from the force applied in the direction of rotation
Gyroscopic Precession
What is in between the two swash plates, allowing the top plate to turn?
Swash Plate Bearing
What does “IGE” stand for?
In Ground Effect
What does the CYCLIC give you?
Pitch/Roll
What type of tail-rotor is this?
NOTAR
When does Translational Lift occur?
At the transition period between hover and horizontal flight
True or False: Main rotor RPM Remains Constant?
True
_________ _________ connect the Pilot and Co-Pilot Flight Controls
Torque Tubes
When you pull collective, each blade generates more ______
lift
On a free turbine helicopter, what is the twist-grip used to control?
Compressor RPM
What is Item 20?
Lower Swash Plate/Inner Ring
What connects to the Upper Swash Plate/Outer Ring?
Pitch Links
The top swash plate is connected to the blades through ______ _____
Pitch Links
_______________ occurs when the engine fails, allows the blades to spin freely to allow a safe landing
Autorotation
When you PULL the COLLECTIVE, the engine would need to input
More Power
What type of tail-rotor configuration is this?
Fenestron
Cyclic attachments have to be ___ _________ apart
90 Degrees
Three Main Flight Controls of a fixed wing aircraft
Ailerons, Elevators, Rudders
Which rotor configuration is this?
Coaxial
_____ ________ are designed to change the direction of a push/pull tube
Bell Cranks
During Autorotation, the ______ must be maintained at a safe level
RPM
If you can see the white nav light of an aircraft, where is it moving,relative to your position?
Away from you
How does the Mast and the Rotating Swash Plate rotate in sync?
Through the use of Scissor Links
When the collective is pulled hard, and not enough counter-torque pedal can be applied, ______ ___ _______ __________ _________________ occurs
Loss of Tail Rotor Effectiveness
What is Item 11?
Drive Link
Which factors affect the RPM of the blades during autorotation
Air Density(Altitude), Temperature, weight
